Adding-machine.



F. J. PETERSON.

ADDING MACHINE.

APPLICATION FILED JUNE 17. ms

' Patented May 29,1917.

3 SHEETS-SHEET 1- F. J. PETERSON.

ADDING MACHINE.

APPLICATION HLED JUNE 17. 1915.

1,227,655. Q Patented May 29, 1917.

3 VSHEETS-QHEET 2.

10 10 L9 10 10 w 2. m 15 5 i A w 56 16 H H 8 i i 21% A 5 5 11 1 44 I7 i55 4'5 5 5 Suva n foz 6 How c1 1 FBEDOLF J. PETERSON, OF ALLIANCE, OHIO.

ADDING-MACHINE.

Specification of Letters Patent.

Patented May-29, 1917.

Application filed June 17, 1915. Serial No. 34,820.

To all whom it may concern:

Bedtknown that I, FREDoLr J PETERSON, a citizen of the United States,residing at Alliancefiin the county of Stark and State of Ohio, haveinvented a new and useful Adding-Machine, of which the following is aspecification.

My invention relates to adding machines and has for its object theprovision of a new and improved adding machine which is comparativelysimple and durable in construction, not liable to easily get out oforder and arranged to permit convenient manipulating with a view to addup any desired number of sums and indicate the total and moreparticularly add sums representing money in dollars and cents or otherdenominations.

A further object is to provide an adding machine of the characterreferred to with aclearing key arranged to clear the machine after eachtotal is made.

With these objects in view the invention consists in the novelconstruction and arrangement of parts, hereinafter described,illustratediin the accompanying drawlngs,

and particularly pointed out in the appended claims, itbeing understoodthat va rious changes in the form, proportions, size and minor detailsof construction may be made within the scope of the appended claimswithout departing from the spirit 0! sacrificing any of the advantagesof the invention.-v

In the accompanying drawings:

Figure 1 is a perspective view of the adding machine.

Fig. 2 is a longitudinal sectional view of the same.

Fig. 3 is a top plan view with the covei removed.

Fig. 4 is a section on line 44, Fig. 3.

Fig. 5 is a section on line 55, Fig. 3.

Fig. 6 is a transverse section through the machine showing the clearingkey in the operative position to clear the machine.

Fig. 7 is a detail perspective view of one of the keys. 5

Fig. 8 is a detail perspective view of one of the number wheels with itsaccompanying key and ratchet.

Similar numerals of reference indicate corresponding parts throughoutthe several figures of the drawings.

In the accompanying drawings .the numeral 1 represents the outer casingof the adding machine which is substantially of the form shown and ispreferably provided with a removable cover 2 arranged to be attachedthereto by mealk of screws 3 or their equivalents. The non-rotatableshaft 4 is rigidly mounted between the side walls of the cas ing 1preferably by screws 5 as best shown in Fig. 2. The shaft 4 is providedwith a key-way 6 and fixedly mounted upon said shaft by means of thetangs 7 located in saidkey-way are the spaced disks 8, each of saiddisks being provided with a substantially V-shaped notch 9 in itsperiphery, the purpose of which will be hereinafter described.

Located between the disks 8 and upon the outside of each of the outerdisks is a number wheel 10,- each of said number wheels being providedwith a hub 11, a boss 12 01' larger diameter than the hub being alsoprovided upon each number wheel, said number wheels being loosely andindependently mounted upon the shaft 4. Four series of numerals from 0to 9 are provided around the periphery of each of the number wheels.sely mounted upon each of the bosses 12 is the annular portion 13 of anoperating key 14, said annular portion being provided with an ellipticalopening 15 arranged to accommodate the boss 12. A ratchet wheel 16.ismounted upon each hub, each of said ratchet wheels being rigidlyconnected to the accompanying number wheel b means of rivets or the like17. Four paw s 18 are. located at equal intervals around each of thenumber wheels and upon the opposite side of each number wheel from theratchet carried thereby, said pawls being arranged to engage the ratchetwheel of the next adjacent number wheel as will be hereinafterdescribed. Each of the pawls 18 is pivotally mounted upon a post 19,said post being provided with a shoulder 20 by means of which the pawlis spaced away from the face of the number wheel and is carried adjacentthe periphery of the next adjacent disk, a portion of said pawlextending over the periphery of the ratchet wheel 6 upon the nextadjacent number wheel and arranged to contact therewith as will behereinafter described.

A lever 21 is fixedly mounted near one extremity of the shaft 4 for thepurpose of adjusting the disks 8 when the machine is assembled. It willbe understood that thedisks are placed upon the shaft so that thenotches of all the disks are in alincment, the lever is then moved tobring the disks into the position best shown in Fig. 6, after square rodas which the screws 5 are tightened, holding the shaft and disk 8rigidly in position.

One of the operating keys is located through each of the slots 22 in thecurved portion of the cover '2. A series of numbers from 1 to 9 islocated adjacent each of the slots 22 and a pointer is provided uponeach of the operating keys 14, said pointer being for the purpose ofindicating the man ber to be added in each column.

A shaft '24 is carried between the side walls of the casing and mountedupon said shaft is a plurality of locking pawls 25, each of said pawlsbeing arranged to engage one of the ratchet wheels 16 for the purpose 0preventing back movement of said ratchet wheels and their accompanyingnumber wheels. Each of the pawls is normally held in engagement with itsrespective ratchet wheel by meansof a coil spring 26 located in asuitable socket 27 in the rib 28, preferably formed integral with therear wall of the casing, said coil springs bearing against the tailportions 29 of the locking pawls.

A, square rod 30 is provided with cylindrical bearing portions 31 and32, which are journaled in the brackets 33 and 34, said brackets beingattached to the casing in any suitable manner, preferably by the screws35 located through the rib 28. A comb 36 is connected to the square rod30 in any suitable and well known manner such as the rivets 37, saidcomb being provided with a series of spring fingers 38, each of saidfingers being arranged to contact with the uppermost locking pawl uponthe adjacent number wheel for the purpose of bringing said pawl intoengagement with the adjacent ratchet wheel as the tapered head 39 ofsaid pawl is moved into the V-shapcd notch 9 of the accompanying disk 8.

In order to normally hold the spring fingers 38 in engagement" with thetransfer pawls a coil spring 40 is carried upon the bearing end 31 'ofthe square rod. the extremity of said spring being located between theshaft 24 and rib 29 as bpst shown in Fig. 4., rock lever it providedwith a finger engaging button 42 is rigidly connected to the bearingportion 32 of the square rod for the purpose of rocking said bestillustrated in Fig. 6 in order to bring these spring lingers 38 out ofengagement with the locking pawlsas will be hereinafter described.

The following device is provided for the purpose of clearing the machineafter a total has been obtained. A pair of arms 43, each provided withan elongated aperture 4.4 are carried upon the shaft 4, one of said armsbeing located at each extremity of the series of number wheels,connected at their lower extremities by means of a rod 45. A pair ofribs, 46

walls of the casing.

said arms being eccentric to the shaft 4 are provided upon the sidewalls of the casing 1, the rod; 45 normally resting at the lowermostextremity of said ribs as best shown in Figs. 2 and 5, the arms *3contacting with the stop pins 47 which are located in the side Acentrally located,

arm &8 is carried by the rod 45, said arm being provided with a pin it),which passes through a slot 50 in the key bar 51, said slot beingprovided with a downwardly disposed portion 52 at its inner extremityand a finger engaging button being provided upon the outer extremity ofsaid key bar. A coil s ring 54 is attached to the key bar 51 a siown andto the rear wall of the casing. The rod 45 is provided with a pluralityof hooks 55 downwardly disposed arranged to engage the posts 19 carriedby the number wheels. The number wheel farthest to the left in Fig. 2 isprovided with four posts 56 arranged to be engaged by the adjacent hookin the same manner that the posts 19 upon the other number wheels areengaged.

The operation 0? the machine is as follows:

Assuming that the first item to be added was (339R, the operating key atthe right hand end of the machine would be placed in the position shownin Fig. 1, the indicator thereon resting adjacent the munber 3 upon thecasing. At the same time the key would be pushed forward, bringing thetapered la 57 thereon into engagementwith the ad]acent ratchet wheel andthe key would be moved back into the normal position. The next adjacentkey would then be raised into the position illustrated in Fig. 1 andoperated in the same manner. Each additional item would be placed in themachine in the same manner. It will be seen that from time 4 sary thetransfer pawls 18 as they pass the notched portion 9 in the disk 8 willengage the ratchet wheel of the next adjacent number wheel to the left,moving said number wheel forward one point. It will thus be seen thatthe machine will add correctly any number of items placed therein asindicated. The locking pawlslz') prevent any back movement of the numberwheels. It will. also be understood that the sum after theaddition ofeach item will be. indicated in the enlarged apertures 58 at the upperextremities of the slots 22. \Vhen .1 total has been obtained and it isdesired ttiadd a new account it is of course necessary to first clearthe machine and this is accomplished by means of the clearing key 51.The finger button 53 is t'rst pressed by the operator and the key barpulled outward, sliding upon the roller 59 carried by the bracket 60. Asthe key bar reaches the limit of its outward movement a slight downwardpresto time as it is necesreas ess hire upon the finger button 53 willcause the key bar to fulcrum upon the roller 59, brin 'ng the downwardlydisposed portion 52 o the slot into engagement with the pin The rocklever 41 will then be depressed, raising the spring fingers 38 out ofengagement with the transfer-pawls and the key bar 51 will then be movedinto the u position shown in Fig. 6, the rod 45 riding upon theeccentric ribs 46 moving the hooks 55 into engagement with the posts 19,bringing all of the number wheels into the nor mal position. Theclearingkey will then engaging thepin 49 from the downwardly disposedportion 52 of the slot therein, the spring 54 holding the clearing keyin its normal position.

I claim: 4 1. .In an adding machine of the character described, thecombination of a casing, a shaft fixed to and carried by said casmg, aseries of number wheels loosely mounted upon said shaft, each of saidnumber wheels bein provided with a hub, a ratchet wheel x'e y mountedupon the hub of each number wheel and spaced from said number wheel, adisk provided with an elongated aperture mounted upon the hub of eachnumber wheel between said number wheel and said ratchet wheel, anoperating key rigidly connected to each disk and a tapered lug carriedby each operating key and arranged to engage the accompanying ratchetwheel.

2. An adding machine comprising a se- 'ries of number wheels, manuallycontrolled means for turnin the number wheels independent one of t eother, a ratchet wheel for each number wheel, sidewise projecting pawlscarried by the number wheels and arranged. to engage the ratchet wheelof the next following number wheel in the series, fixed disks arrangedbetween and concentric with the number wheels, each disk normallyholding the corresponding awls out of engagement with the next folowingratchet wheel, the disks having a notch for allowing the pawls to moveinto engagement with the ratchet wheels, a rock bar locatcd adjacentsaid number wheels, spring fingers carried by said rock bar and arrangedto normally hold said pawls in engagement with the peripheries of saiddisks and means for rocking said rock bar to move said spring fingersout of engagement with said pawls.

3. An adding machine comprising a series of number wheels, manuallycontrolled means for turning the number wheels independent one of theother, a ratchet wheel /for each number wheel, sidewise rejecting pawlscarried by the number w eels and arranged to engage the ratchet wheel ofthe next following number wheel in the sebe moved back into its normalposition, disa ries, fixed disks arranged between and concentric withthe number wheels each disk normally holding the corresponding pawls outof engagement with the next following ratchet wheel, the disks having anotch for allowing the pawls to move into' engagement with the ratchetwheels, a rock'bar located adjacent said number wheels, spring fingerscarried bysaid rock bar and arranged to normally hold said pawls inengagement with the peripheries of said disks and means for rocking saidrock bar to move said spring fingers out of engagement with said pawls,and means for moving all of said number wheels for the purpose ofclearing the machine.

4. In an adding machine of the character described, the combination of acasing, 21

\ shaft fixed to and carried by said casin a series of toothed numberwheels loose y mounted upon said shaft, the periphery of each of saidnumber wheels being provided with a plurality of series of figures from9 tot), a cover iovided with slots, sa id cover also providhd withfigures near the edges of said slots, a series of disks located betweensaid number wheels and fixedly mounted upon said shaft, each of saiddisks provided with a notch in its periphery, a plurality of transferpawls carried by the number wheels, one of said pawls being provided foreach series of numbers from 0 to 9 upon each number Wheel, said transferpawls arranged to travel around the periphery of said disks, springsarranged to throw said pawls 1nto said recesses, means for moving saidsprings out of engagement with said pawls, a pair of slotted armsmounted upon said shaft, a rod fixedly connected to said arms, hooksupon said rod arranged to engage said number wheels and a key barconnected to said rod and arranged to oscillate the same. I

5. In an adding machine of the character described, the combination of acasing, a shaft fixed to and carried by said casing, a series oftoothed. number wheels loosely mounted upon said shaft, the periphery ofeach of said number wheels being provided with a plurality of series offigures from 0 to 9, a cover provided with slots, said cover alsoprovided with figures near the edges of said slots, "a series of diskslocated between said number wheels and fixedly mounted upon said shaft,each of said disks provided with a notch in its periphery, a pluralityof transfer pawls carried by. the number wheels, one of said pawls beingprovided for each series of numbers from arms mounted upon said shaft, arod fixedly connected to said arms, hooks upon said rod arranged toengage said number wheels and a key bar connected to said rod andarranged to oscillate thclsame and curved ribs located upon the sidewalls of said casing and eccentric to said being for the purpose o'figuiding said rod. (3; In an adding machine of the character described,the combination of a casing, 11 shat't fixed to and carried by saidcasing, a series of number wheels being provided with a hub, a ratchetwheel fixedly mounted upon the hub of each number wheel. and spaced fromsaid number wheel, a disk provided with an elongated aperture mountedupon the hub of each number wheel bcshaft, said ribs operating key andarranged to engage the' accompanying ratchet wheel, a rock bar 10- ratedadjacent said number wheels, means carried by said rock bar and arrangedto normally hold each of said number wheels in operative engagement withthe next adjacent ratchet wheel, means for rocking said rock bar fordisengaging said number wheels from said ratchet wheels and means formoving all of said number Wheels for the purpose of clearing themachine.

In testimony that I claim the above, I have hereunto.subscribed. myname.

FREDOTJF J. PETERSON.

